Effects of strength and durability of salted soil to foam lightweight soil(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2021年3期
- Page:
- 33-41
- Research Field:
- 道路工程
- Publishing date:
Info
- Title:
- Effects of strength and durability of salted soil to foam lightweight soil
- Author(s):
- YAO Yunshi; WANG Jia
- （Key Laboratory of Road Construction Technology and Equipment Ministry of Education,Changan University, Xian 710064, Shaanxi, China)
- Keywords:
- road engineering; foamed lightweight soil; soft soil roadbed; saline soil; durability
- PACS:
- -
- DOI:
- -
- Abstract:
- In order to expand the application of foamed lightweight soil materials on the alkalized soft soil roadbed in Shanxi, the foamed lightweight soil as the basic material was used, and the effects of sand powder, saline soil, and fly ash on the compressive strength of foam lightweight were discussed. The durability of foam light soil samples with different bulk density was also analyzed. The results show that the compressive strength of the foamed light soil has a significant downward trend when the admixtures are added separately, after compound the fly ash and saline soil, then add to the foamed light soil, the saline soil will produce a certain alkali activation effect on fly ash. When the mass ratio of saline soil to fly ash is 10%, the 56 d compressive strength of foam light soil exhibit the highest value. The compressive strength is 0.72 MPa at a bulk density of 700 kg/m3. The mixing ratio of the admixture in the lightweight soil can be significantly increased owing to the compounding action. The lightweight soil matrix has better stability when the mass of cementitious materials reached 40% with the bulk density of 800 kg/m3, the foamed lightweight soil material can increase the proportion of admixtures and saline soil used in the construction area and optimize the performance and application of foamed lightweight soil, which also provide a certain theoretical basis for the application of saline soil/fly ash in foam light soil. 3 tabs, 10 figs, 32 refs.
Last Update: 2021-06-04